Q:
What are the brightest stars in order from brightest to least in
the constellation of orion?

A:
The brightest stars in a constellation are listed
alphabetically, used the Greek alphabet. In order of brightness,
they are alpha Orionis, also known as Betelgeuse, beta Orionis,
a.k.a. Rigel, gamma Orionis, a.k.a. Bellatrix, delta Orionis,
a.k.a. Mintaka, epsilon Orionis, a.k.a. Alnilam, zeta Orionis,
a.k.a. Alnitak, eta Orionis, theta Orionis, a famous multiple
star called the
Trapezium in the heart of the Orion Nebula.